Bump go to 1.21.6 in GH kind action (#1496)

Signed-off-by: Yash Sethiya <[email protected]>

Author: sethiyash

.github/workflows/kind-action.yml

@@ -27,7 +27,7 @@ jobs:
           fetch-depth: 0
       - uses: actions/setup-go@v5 # default version of go is 1.10
         with:
-          go-version: "1.19.6"
+          go-version: 1.21.6
       - name: Install Carvel Tools
         run: ./hack/install-deps.sh
       # Run benchmark with `go test -bench` and stores the output to a file